Dell PowerConnect B-RX Configuration Manual page 246

7
Configuring IP parameters
Static cache entries
You can manually add entries to the DNS cache table if you know a host's complete, qualified name
and its IP address. To add host names and their IP addresses to the DNS cache table, enter
commands such as the following.
BigIron RX(config)#ip dns cache-entry www.foundrynet.com 63.236.63.244 720
Syntax: [no] ip dns cache-entry <host-name> <ip-address>
<host-name> Complete, qualified name . For example, enter www.company.com or
host.company.com.
<ip-address> Enter the IP address of the host. This must be the correct IP address for the host.
Use the no form of the command to manually remove an entry from the DNS cache table; however,
you must enter the entire entry to delete the entry.
BigIron RX
Clearing the DNS cache table
To clear the entire DNS cache table, enter the following command.
BigIron RX#clear ip dns cache-table
To clear a specific entry in DNS cache table, enter the following command.
BigIron RX# clear ip dns cache-table www.foundrynet.com
OR
BigIron RX# clear ip dns cache-table 63.236.63.244
Syntax: clear ip dns cache-table [ip-address | host-name]
<host-name> Complete, qualified name . For example, enter www.company.com or
host.company.com.
<ip-address> Enter the IP address of the host. This must be the correct IP address for the host.
Displaying the DNS cache table
To display what hosts are currently in the DNS cache table, enter the following command.
BigIron RX(config)#show ip dns cache-table
Host
border2.pc0-0-bbnet1.sje.pnap.net (TMP,OK)
sl-internap-109-0.sprintlink.net
sl-st21-sj-13-0.sprintlink.net
mail.company.com
To display the individual entries in the cache-table, enter a command such as the following.
BigIron RX(config)#show ip dns cache-table border2
Host Flag TTL/min Address
border2.pc0-0-bbnet1.sje.pnap.net (TMP,OK) 720 66.151.144.5
OR
BigIron RX(config)#show ip dns cache-table 66.151.144.5
Host Flag TTL/min Address
border2.pc0-0-bbnet1.sje.pnap.net (TMP,OK) 720 66.151.144.5
174
(config)#no ip dns cache-entry www.foundrynet.com 63.236.63.244
Flag Address
66.151.144.5
(TMP,OK) 144.223.242.86
(TMP,OK) 144.232.20.59
(STA,OK) 64.236.22.148
BigIron RX Series Configuration Guide
53-1001986-01